[Answered ]-Django/Heroku first deployment results in H10 error

Your Procfile is not a valid one

You have to change

web: python manage.py runserver 0.0.0.0:$PORT

to

web: gunicorn your_django_progect_name.wsgi:application --log-file - --log-level debug

Be sure to add gunicorn to your requirements.txt file as well. read this